Grass-Fed Whey Protein
Whey derived from cows raised exclusively on grass. Slightly higher in omega-3 fatty acids and conjugated linoleic acid (CLA) compared to conventional whey.
An ingredient with growing research
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Effects reported in research
Equivalent muscle protein synthesis stimulation to conventional whey
May contain slightly more omega-3 and CLA
An option for those prioritizing antibiotic- and pesticide-free sourcing
Dosage & timing
- 20–40 g per serving, same as standard whey.
- Dose based on total protein targets.
Cautions
- •Contraindicated for milk protein allergy.
- •Nutritional differences are small — whether the premium price is worthwhile depends on priorities.
- •Consult a doctor for kidney conditions.
Supporting research
Ingestion of whey hydrolysate, casein, or soy protein isolate: effects on mixed muscle protein synthesis at rest and following resistance exercise in young men
Journal of Applied Physiology, 2009
ホエイ（加水分解）・カゼイン・ソイプロテインを摂取した後の安静時・運動後の筋タンパク質合成（MPS）を比較したRCT。ホエイは急速吸収・高ロイシン含量によりカゼイン・ソイより運動後MPSを有意に高めた。カゼインは吸収が遅く夜間の徐放性補給に適している。ソイはホエイとカゼインの中間的な特性を示した。
Protein supplementation augments resistance-training-induced gains in muscle mass and strength (meta-analysis)
British Journal of Sports Medicine, 2018
A synthesis of 49 RCTs (1,863 participants). Protein supplementation significantly increased gains in lean mass and 1RM from resistance training; benefits plateaued beyond about 1.6 g/kg/day of total protein.
Similar supplements
Egg White Protein
Confidence: ModerateEgg white (albumin) protein
Dehydrated egg white in powder form. Dairy-free, making it an alternative for those who cannot use whey or casein. Digestion speed is intermediate between whey and casein.
Whey Protein Isolate
Confidence: HighWhey protein isolate (WPI)
A highly purified whey fraction with 90%+ protein, minimal lactose and fat. Suitable for those with lactose intolerance who want fast-digesting protein.
Casein Protein
Confidence: HighCasein (Micellar Casein / Calcium Caseinate)
Casein protein is a milk-derived protein characterized by slow digestion and absorption over 6 to 8 hours. Research suggests that pre-sleep casein intake may enhance muscle protein synthesis overnight. Combining casein with whey protein is thought to optimize both immediate and prolonged amino acid delivery.
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